I jump out of planes for a living. There's not much serenity involved. You have engine noise the entire time in the flight. Then there's that noise when the doors open and your heart starts racing. About this time your brain is asking why you do this and if you remember the pain from the last jump. Next you exit the aircraft, get tossed around and then yanked really hard. If you're lucky, you aren't swinging like a pendulum in a grandfather clock. Once I looked up and saw a C-17 (cargo bird slightly smaller than a 747) coming straight at me. I'm sure he was a couple hundred feet above me, but the mind plays tricks when you are screaming toward Earth at 15ft per second. Once all this fun and relatively peaceful part is over, you know what's coming next. If things are going well, you are drifting ever so slightly in a favored direction - for me, this is to the left. You make sure your feet and knees are together and relax. Yeah, relax knowing in a couple of seconds you are going to know what gravity is. Then it happens. This can be mostly summed up in one word - WHAM! quickly followed by OOOOH, and possibly some expletives. I've seen flickers of light 3 times when I hit. That would be my brain slamming into my skull. Usually this is following me hitting the ground on uneven terrain, having the wind change direction on me right at the last minute, or just general bad luck. I do this for an extra $150 in my paycheck. Crazy people do it for fun!